Security Element Verification via Electroluminescent Intensity Maxima
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for verifying security elements in documents with electroluminescent properties and field displacement elements are complex and not sufficiently reliable.
Innovation Solution
A method and device that excite electroluminescent pigments in a security element using an electrical field, detect spatially discrete intensity maxima in an optical image, and verify the presence and concentration of electroluminescent pigments and field displacement elements based on intensity and spatial properties, utilizing image acquisition and evaluation techniques.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex verification methods are used to ensure reliability of security element testing, then measurement precision and reliability improve, but device complexity and ease of operation deteriorate
Solution Approach 1:
The invention extracts only the essential verification information by detecting local intensity maxima positions and their spatial distribution, rather than analyzing the complete optical image or using complex spectral analysis. This extraction of key features maintains verification reliability while significantly simplifying the evaluation process and reducing device complexity
Solution Approach 2:
The invention creates a simplified digital representation of the security element's verification characteristics by recording the positions and properties of local intensity maxima. This digital copy contains all necessary verification information in a compact form, eliminating the need for complex physical analysis apparatus while maintaining high measurement precision
2Measurement precision
If detailed analysis of optical images is performed to ensure accurate verification, then measurement precision improves, but processing time and productivity deteriorate
Solution Approach 1:
The method extracts only the positions and properties of local intensity maxima from the optical image, ignoring all other pixel information. This selective extraction maintains verification accuracy by focusing on the diagnostically relevant features while dramatically reducing data processing requirements and increasing verification speed
Solution Approach 2:
The verification process is segmented into discrete steps: detecting local intensity maxima, recording their positions, and evaluating spatial distribution. This segmentation allows the system to process only the essential information needed for verification, improving both speed and efficiency without sacrificing measurement precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables simple and reliable verification of security elements, suitable for automated systems, by detecting local intensity maxima and evaluating their spatial distribution and intensity properties, ensuring the presence and correct mixing ratio of electroluminescent and field displacement elements.
Implementation Method 1
the security element contains at least one particulate substance with electroluminescent properties and at least one field displacement element
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a method and a device for checking a security element of a security document (6), said security element containing at least one particulate substance with electroluminescent properties and at least one field suppression element. The method has the following method steps: applying an electric excitation field to the security element, - generating an optical image (16) of at least one region of the security element after or during the production of the electric excitation field, - detecting local intensity maxima (15) in the optical image (16), and - verifying the security element if a number of local intensity maxima (15) present at different image positions is greater than or equal to a specified number, said number being at least two.